Util.java :  » Game » locusts » PicCat » view » Java Open Source

/*
 * Copyright (c) 2009, Hamish Morgan. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the University of Sussex nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package piccat.view;

import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.Rectangle;
import javax.swing.SwingUtilities;

/**
 *
 * @author hamish
 */
public class Util {

    private Util() {
    }

    public static int getIntersectionArea(Component a, Component b) {
        // FIXME
        Rectangle boundsA = getScreenBounds(a);
        Rectangle boundsB = getScreenBounds(b);
        Rectangle inter = boundsA.intersection(boundsB);
        if (inter.isEmpty())
            return 0;
        return (int) Math.abs(inter.getWidth() * inter.getHeight());
    }

    public static Rectangle getScreenBounds(Component c) {
        final Rectangle bounds = (Rectangle)c.getBounds().clone();
        final Point l = bounds.getLocation();
        SwingUtilities.convertPointToScreen(l, c);
        bounds.setLocation(l);
        return bounds;
    }

    public static Dimension getGridDimensions(Container cont) {
        GridLayout layout = (GridLayout) cont.getLayout();
        if(layout == null)
            return new Dimension(0,0);
        int w = cont.getWidth() / layout.getColumns() -
                ((layout.getColumns() - 1) * layout.getHgap());
        int h = cont.getHeight() / layout.getRows() -
                ((layout.getRows() - 1) * layout.getVgap());
        return new Dimension(w, h);
    }
}